JP2007045556A - Rolled sheet printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolled sheet printer with a rolled sheet detecting mechanism which gives no operation trouble in replacing a rolled sheet. <P>SOLUTION: The rolled sheet printer 1 comprises a closable cover unit 3 mounted on the front face of a body unit 2 closably to the front side. When the closable cover unit 3 is opened, the front side of a rolled sheet storage part 9 in a printer body is put into an opened condition to allow the replacement of the rolled sheet 10. A detecting protrusion 53 of the rolled sheet detecting mechanism 50 is protruded in the rolled sheet storage part 9. When the rolled sheet 10 is running out, the position of its core hole 101 lowers and the detecting protrusion 53 is put into the core hole 101 to detect that the rolled sheet 10 is running out. When the closable cover unit 3 is opened, a link lever 72 is moved from a first position to a second position on the front side thereof and its abutting plate portion 72c pushes the detecting protrusion 53 therein to hold it in the condition being set out of the rolled sheet storage part 9. Thus, rolled sheet replacing work can be efficiently done without being disturbed by the detecting protrusion 53. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a roll paper printer provided with a roll paper detection mechanism that has been improved so that the roll paper can be easily replaced.

  In a roll paper printer that prints on a roll paper with a tape-shaped recording paper wound around a core with a hole in the center, a roll paper detection mechanism is installed to detect when the roll paper is low It has been. As the recording paper is printed and conveyed, the diameter of the roll paper gradually decreases. As the roll paper detection mechanism, the roll paper is pressed against the side surface of the roll paper stored in the roll paper storage unit, the diameter of the roll paper is reduced, and the core hole of the roll paper is lowered to a predetermined height position. A device using a detection lever having a detection protrusion to be inserted is known. When the detection protrusion is inserted into the core hole of the roll paper, the detection lever moves as a whole. When this detection lever moves, a detection switch such as a mechanical switch is turned on and the printer control unit recognizes the roll paper. A display indicating that the remaining amount is low or prompting the user to replace the roll paper is displayed. A detection mechanism that detects that the remaining amount of roll paper has decreased using such a detection lever is disclosed in Patent Document 1.

When there is no roll paper in the roll paper storage unit, in the roll paper detection mechanism using the detection lever, the detection protrusion of the detection lever protrudes into the roll paper storage unit. Therefore, when the roll paper is stored, the roll paper is stored in the roll paper storage unit while the detection protrusion is pushed in by the side surface of the roll paper. Further, when taking out the roll paper, the roll paper is taken out while pushing the detection protrusion inserted into the core hole of the roll paper sideways. Therefore, the detection protrusion of the detection lever is formed with a tapered surface in the roll paper storage direction and the take-out direction so that the detection protrusion can be pushed in smoothly when such roll paper is stored and taken out. It has become.
JP 2003-11453 A

  Here, when the roll paper is stored or taken out when replacing the roll paper, if the roll paper is vigorously stored or pulled out, the detection protrusion of the detection lever cannot follow the detection protrusion quickly and the roll paper is moved to the detection protrusion. May be caught and the operability of the roll paper storage or removal operation may be hindered.

  In order to improve the operability of the roll paper storage or removal operation, it is necessary to allow the detection protrusion to be smoothly pushed in, for example, by providing a taper with a large angle on the surface of the detection protrusion in the storage and removal direction of the roll paper. There is. However, if a tapered surface with a large angle is formed on the detection protrusion, it becomes difficult to accurately set the point in time when the detection protrusion is inserted into the roll paper core hole, compared with the case where the detection surface is not attached. The problem of degradation occurs.

  In view of the above, an object of the present invention is to propose a roll paper printer having a roll paper detection mechanism that does not impair the operability of roll paper storage and take-out operations.

  In order to solve the above problems, a roll paper printer of the present invention includes a roll paper storage unit, an opening / closing lid for opening and closing the roll paper storage unit, and a side surface of the roll paper stored in the roll paper storage unit. When the core hole of the roll paper is pressed down to a predetermined height position, a detection lever provided with a detection projection inserted into the core hole, and in conjunction with the opening operation of the opening / closing lid, And a detection protrusion retracting mechanism for forcibly retracting the detection protrusion of the detection lever protruding from the roll paper storage unit.

  Here, the detection protrusion retracting mechanism reciprocates between a first position removed from the detection protrusion and a second position pushing the detection protrusion into the retracted state in conjunction with the opening / closing operation of the opening / closing lid. A moving plate may be provided.

  In the roll paper printer of the present invention, when the opening / closing lid is opened, the detection protrusion of the detection lever is retracted from the roll paper storage portion in conjunction with the opening / closing lid. Therefore, when the roll paper is stored, the roll paper to be stored does not hit the detection protrusion. Similarly, when removing the remaining roll paper, the detection projection inserted into the core hole is pulled out and retracted, so that the roll paper does not hit the detection projection. Therefore, the operability of the roll paper storing and taking out operation is not hindered by hitting the detection protrusion.

  In addition, it is not necessary to form an inclined surface such as a tapered surface for pushing the detection protrusion with the roll paper when the roll paper is stored and taken out. As a result, the detection accuracy by the detection protrusion can be increased.

  Next, in the present invention, the detection protrusion retracting mechanism includes an urging member that urges the moving plate toward the first position. When opening the opening / closing lid, the urging force of the urging member acts on the opening / closing lid unit as a force in the direction of closing it. Therefore, it is possible to prevent the adverse effect that the opening / closing lid unit opens vigorously and collides with the printer installation surface or the like.

  In the roll paper printer of the present invention, the detection protrusion of the detection lever for detecting the roll paper is retracted from the roll paper storage unit in conjunction with the opening operation of the opening / closing lid. Accordingly, the roll paper can be stored and taken out without being disturbed by the detection protrusion.

  Embodiments of a roll paper printer to which the present invention is applied will be described below with reference to the drawings.

(overall structure)
FIG. 1 is an external perspective view of a roll paper printer to which the present invention is applied, and FIG. 2 is an external perspective view showing a state in which the opening / closing lid unit is opened.

  A roll paper printer 1 according to the present embodiment has a printer main body 2 and an opening / closing lid unit 3 (opening / closing lid) attached to the front surface of the printer main body 2. An operation panel unit 4 is provided at the front end of the printer main body 2. It is attached. A recording paper discharge port 5 extending in the printer width direction is formed at the upper end portion of the opening / closing lid unit 3 on the front surface of the printer.

  The printer main body 2 is covered with a box-shaped main body case 6 which is long before and after the front and bottom surfaces are opened. On the front surface of the open / close lid unit 3, an open / close lid case 7 that defines the front surface of the printer is attached. When the operating lever 8 disposed on the operation panel unit 4 is operated, the opening / closing lid unit 3 is unlocked by a lid lock (not shown) and opens forward with the lower end as a center. When the opening / closing lid unit 3 is opened, the front side of the roll paper storage unit 9 formed inside is opened, and the roll paper 10 can be replaced. On the front surface of the operation panel unit 4, a status display lamp group 4a made of LEDs and the like, a feed button 4b, and a power switch 4c are arranged.

  As will be described later, the roll paper storage unit 9 incorporates a roll paper detection mechanism for detecting that the roll paper stored therein has become a predetermined amount (predetermined diameter) or less. When a control unit (not shown) installed in the roll paper printer 1 detects that the roll paper has become a predetermined amount or less, for example, one of the status display lamp groups 4a is lit or blinks to that effect. Is displayed. Further, when the roll paper printer 1 is connected to a terminal device (not shown), the terminal device is notified accordingly.

  FIG. 3 is a schematic configuration diagram showing the inside of the roll paper printer 1. A roll paper storage unit 9 formed inside the roll paper printer 1 has an arc-shaped bottom plate 12 extending in the printer width direction, an arc-shaped top plate 13 extending in the printer width direction, and also extending in the printer width direction. Surrounded by the front plate 14. The roll paper storage unit 9 stores roll paper 10 in a rollable state. A core hole 101 is provided in the center of the roll paper 10. The tape-like recording paper 10a fed out from here is pulled out while passing through the printing position between the platen roller 15 and the thermal head 16, and is discharged from the recording paper discharge port 5 located in front of it. A scissors-type recording paper cutting device 20 is disposed in front of the recording paper discharge port 5.

  The recording paper cutting device 20 includes a fixed blade 21 mounted on the printer body 2 side, a movable blade 22 and a movable blade drive mechanism 23 mounted on the opening / closing lid unit 3 side. The fixed blades 21 are arranged in the printer width direction in a substantially horizontal posture with the blade edge 21a facing forward. The movable blades 22 are arranged in the printer width direction at a position almost directly below the blade edge 21a of the fixed blade 21 with the blade edge 22a facing upward. In a state where the recording paper 10a is discharged between the cutting edges 21a and 22a (recording paper cutting position), the lower movable blade 22 is swung upward to be sandwiched between the two cutting edges 21a and 22a. A portion of the recording paper 10a is cut in the printer width direction.

  FIG. 4 is a side view showing the mechanism (the printer body 2 and the opening / closing lid unit 3) of the roll paper printer 1 with the main body case 6 and the opening / closing lid case 7 removed. FIGS. 5A and 5B are a perspective view and a side view in a state where one side plate is omitted as shown by an imaginary line in order to show the internal structure. 6A and 6B are a perspective view and a side view showing a case where the opening / closing lid unit is opened in the same state as in FIG.

  Referring to these drawings, the printer main body 2 includes a base plate 31, left and right side plates 32 and 33 standing upright from the base plate 31, and rear sides of the left and right side plates 32 and 33. A back plate 30 is provided between the parts in the printer width direction. Between the upper ends of the side plates 32, 33, a head mounting plate 34 is stretched horizontally in the printer width direction. On the lower surface of the head mounting plate 34, the thermal head 16 has a substantially horizontal posture with the head surface 16 a facing downward. Is attached (see FIG. 3). The top plate 13 of the roll paper storage unit 9 is disposed below the rear portion of the head mounting plate 34. The bottom plate 12 of the roll paper storage unit 9 is disposed on the upper surface of the base plate 31.

  A fixed blade mounting plate 35 is disposed horizontally in the printer width direction above the head mounting plate 34, and the fixed blade 21 of the recording paper cutting device 20 faces forward and substantially horizontal below the front end of the fixed blade mounting plate 35. Is attached. The fixed blade mounting plate 35 is bridged between the upper ends of left and right swivel plates 36 and 37 (only the swivel plate 37 is shown in the figure) arranged outside the side plates 32 and 33. The swivel plates 36 and 37 can be slightly swiveled in the front-rear direction of the printer around their lower end portions 36a and 37a (only the lower end portion 37a is shown in the figure). When the recording paper 10a is cut by the recording paper cutting device 20, both the blade edges 21a and 22a intersect in a point contact state while the movable blade 22 pivots upward from the lower side and pushes the fixed blade 21 rearward. 10a is cut. In order to slightly retract the fixed blade 21 during cutting, the fixed blade 21 is supported by the swivel plates 36 and 37.

  A roll paper detection mechanism 50 for detecting that the remaining amount of the roll paper 10 stored in the roll paper storage unit 9 has become a predetermined amount or less is assembled to the lower end portion of the outer surface of the side plate 32. .

  On the other hand, the open / close lid unit 3 is configured to open by a predetermined angle forward of the printer around the support shafts 41 and 42 attached to the lower ends of the side plates 32 and 33 of the printer body 2. The opening / closing lid unit 3 includes a front plate portion 43 and narrow side plate portions 44 and 45 bent at right angles from both sides to the rear. A movable blade 22 and a movable blade drive mechanism 23 of the recording paper cutting device 20 are attached to the front surface of the front plate portion 43, and these portions are covered with a protective plate 24. The front side of the protection plate 24 is covered with an open / close lid case 7 (see FIG. 3). Further, the platen roller 15 is spanned between the side plate portions 44 and 45 in a rotatable state. Under the platen roller 15, the front plate 14 of the roll paper storage unit 9 attached to the back surface of the front plate portion 43 is disposed.

  As described above, the opening / closing lid unit 3 is mounted with the front plate 14 of the roll paper storage unit 9, the platen roller 15, and the movable blade 22 of the recording paper cutting device 20. When the opening / closing lid unit 3 is opened, as shown in FIGS. 2 and 5, the roll paper storage unit 9 is opened, and the recording paper discharge port 5 passes from the roll paper storage unit 9 via the printing position and the cutting position. The recording paper transport path leading to is opened. Therefore, when the open / close lid unit 3 is closed in a state where the recording paper 10a is pulled out from the roll paper 10 stored in the roll paper storage unit 9, the state in which the recording paper 10a is set along the recording paper conveyance path is automatically set. Can be formed.

(Roll paper detection mechanism)
FIGS. 7A, 7B, and 7C are a partial perspective view, a partial plan view, and a partial side view showing the roll paper detection mechanism 50 of this example. 8A, 8B, and 8C are a partial perspective view, a partial plan view, and a partial side view of the roll paper detection mechanism 50 in a state in which the opening / closing lid unit 3 is opened.

  4 to 8, the roll paper detection mechanism 50 includes a detection lever 51 attached to the outer surface of the side plate 33 of the printer body 2. The end of the detection lever 51 on the rear side of the printer can be turned in the printer width direction around a support shaft 52 attached to the side plate 33. A biasing member such as a torsion spring (not shown) is disposed on the support shaft 52, and the detection lever 51 is always biased inward in the printer width direction by the biasing member.

  A detection projection 53 protruding inward in the printer width direction is attached to the front end portion of the detection lever 51. The detection protrusion 53 protrudes into the roll paper storage unit 9 through an opening 32a (see FIG. 4) opened in the side plate 33. The bottom plate 12 of the roll paper storage unit 9 is slightly inclined forward, and the roll paper 10 placed thereon gradually decreases in diameter when used, and the core hole 101 is slightly reduced accordingly. Descends forward. When the remaining amount of the roll paper 10 is equal to or less than the predetermined amount, the core hole 101 of the roll paper 10A reaches the position 101A including the protruding position of the detection protrusion 53 as shown by a one-dot chain line in FIG. ing.

  The detection protrusion 53 is held in a state of being pressed against the side surface of the roll paper 10 stored in the roll paper storage unit 9 until the remaining amount of the roll paper 10 becomes a predetermined amount or less. When the core hole 101 of the roll paper 10 is lowered to a predetermined height position, that is, the protruding position of the detection protrusion 53, the detection protrusion 53 is switched to the state inserted into the core hole 101.

  As shown in FIGS. 7B and 8B, the rear end of the detection lever 51 is connected to one switching piece 54 a of the detection switch 54. In a state where the detection protrusion 53 is pressed against the side surface of the roll paper 10, the detection switch 54 is in an off state. When the detection protrusion 53 is inserted into the core hole 101 of the roll paper 10, the detection lever 51 is turned, and the detection switch 54 connected to the rear end is turned on. Therefore, it is understood that the output of the detection switch 54 is detected by a control unit (not shown), and the remaining amount of the roll paper 10 becomes equal to or less than a predetermined amount, so that replacement is necessary.

  Here, in the roll paper detection mechanism 50 of this example, the detection protrusion 53 of the detection lever 51 protruding into the roll paper storage unit 9 is forcibly applied to the roll paper in conjunction with the opening operation of the opening / closing lid unit 3. A detection protrusion retracting mechanism 55 for retracting from the storage unit 9 is provided.

  The detection protrusion retracting mechanism 55 of the present example is linked to the opening / closing operation of the opening / closing lid unit 3, and the first position A is removed from the detection protrusion 53 and the second position B is pushing the detection protrusion 53 into the retracted state. A link lever 72 (moving plate) that reciprocates between the two is provided. Further, a tension coil spring 67 (biasing member) that pulls the link lever 72 to the first position A is provided.

  The front end portion 72a of the link lever 72 is coupled to a support pin 69 attached to the side plate 45 of the opening / closing lid unit 3 in a vertically rotatable state. A linear slide hole 72b that is long in the longitudinal direction of the printer is formed at the rear end of the link lever 72. A slide pin 65 attached to a rear portion of the side plate portion 63 of the bottom plate 12 of the roll paper storage unit 9 is inserted into the slide hole 72b in a slidable state. The tension coil spring 67 is stretched between the slide pin 65 and the lower end portion of the back plate 30 of the printer main body 2 in a tension state.

  When the opening / closing lid unit 3 is opened and closed, the link lever 72 reciprocates between the first position A (see FIG. 7) and the second position B (see FIG. 8) in conjunction with this. A wide portion is formed in the middle portion of the link lever 72, and the contact plate portion 72 c projecting downward from the link lever 72 moves along a movement path passing through the protruding position of the detection protrusion 53. In the state in which the link lever 72 is in the first position A (the state in which the opening / closing lid unit 3 is in the closed position 3A (see FIG. 1)), as shown in FIGS. 72 c is located at a position deviated to the rear side of the detection protrusion 53. When the link lever 72 is moved to the second front position B, the detection projection 53 is pushed outward by the contact plate portion 72c, hits the outer surface of the contact plate portion 72c, and detected by the contact plate portion 72c. Is kept in the retracted state. When the opening / closing lid unit 3 is closed from the open position 3B, the link lever 72 returns from the second position B to the first position A in conjunction with this, and the detection projection 53 is detached from the contact plate portion 72c, and the roll paper storage section It returns to the state which protruded in 9.

  Thus, in this example, the detection projection 53 is retracted from the roll paper storage unit 9 in conjunction with the opening operation of the opening / closing lid unit 3. Therefore, when the roll paper 10 is replaced, the detection projection 53 is retracted from the roll paper storage unit 9, so that the operability at the time of replacement of the roll paper 10 is not hindered by hitting the detection projection 53.

  In addition, since the detection protrusion 53 is retracted in this way, an inclined surface such as a tapered surface for facilitating pressing of the detection protrusion 53 at the time of replacing the roll paper is formed on the tip portion of the detection protrusion 53. There is no need. If an inclined surface such as a tapered surface can be omitted, an effect that the detection accuracy by the detection protrusion 53 can be improved is obtained.

  In this example, as shown in FIG. 7, tapered surfaces 53 a and 53 b are formed at the outer peripheral surface portion in the front-rear direction of the printer at the tip portion of the cylindrical detection protrusion 53 as a whole. The front taper surface 53 a is provided so as not to interfere with the edge of the opening 33 a of the side plate 33, and the rear taper surface 53 b is smoothly pushed by the contact plate portion 72 c of the link lever 72. It is provided to ensure that Tapered surfaces on the outer peripheral surface portions 53c and 53d on both sides in the direction orthogonal to this, that is, the moving direction of the core hole 101 of the roll paper 10 (the direction indicated by the arrow C in FIGS. 5B and 7C) Is not formed. Thus, since the taper surface is not provided in the outer peripheral surface part of the both sides of a roll paper detection direction, compared with the case where a taper surface is attached to this outer peripheral surface part, detection accuracy can be improved.

(Roll paper feed mechanism of roll paper storage unit)
In the roll paper storage unit 9 of the roll paper printer 1 of this example, the bottom plate 12 is switched to a substantially horizontal posture and a forward tilted posture in conjunction with opening / closing of the opening / closing lid unit 3. When the opening / closing lid unit 3 is opened, the bottom plate 12 assumes a forward tilting posture, and the roll paper 10 placed on the bottom plate 12 rolls by its own weight and is fed forward. In this example, as described below, a mechanism for feeding out the roll paper 10 is configured using the components (link lever 72, tension coil spring 67, etc.) of the detection protrusion retracting mechanism 55 described above.

  Referring mainly to FIGS. 3, 5, and 6, the bottom plate 12 is placed on the base plate 31 with the front end portion thereof being rotatable about the support shaft 61 in the longitudinal direction of the printer. Slide pins 64 and 65 (only the slide pin 65 is shown in the figure) are attached to the rear portions of the side plate portions 62 and 63 on both sides of the bottom plate 12 in a state of protruding sideways.

  The tension coil springs 66 and 67 (only the tension coil spring 67 is shown in the figure) are stretched between the slide pins 64 and 65 and the lower end portion of the back plate 30. Has been. By these left and right coil springs 66, 67, the bottom plate 12 is held at a substantially horizontal posture 12 </ b> A with its back surface in contact with the base plate 31.

  Between the slide pins 64 and 65 and the support pins 68 and 69 attached to the middle portions in the vertical direction of the left and right side plate portions 44 and 45 of the opening / closing lid unit 3, respectively, Link levers 71 and 72 are bridged. The front end portions 71a and 72a of the link levers 71 and 72 are attached to the support pins 68 and 69 so as to be rotatable in the vertical direction of the printer. The rear end portions of the link levers 71 and 72 are formed with linear slide holes 71b and 72b that are long in the front-rear direction of the printer, and the slide pins 64 and 65 are slidably inserted therethrough. Further, as shown in FIG. 4, these slide pins 64 and 65 are formed in arcuate guide holes 73 and 74 (only the guide holes 74 are shown in the figure) formed in the left and right side plates 32 and 33. Have been passed through. The guide holes 73 and 74 are arcs centered on the support shaft 61, and when the bottom plate 12 rotates about the support shaft 61, the slide pins 64 and 65 move along these guide holes 73 and 74.

  A roll paper feeding operation in the roll paper storage unit 9 configured as described above will be described. When the open / close lid unit 3 is closed, the left and right slide pins 64 and 65 of the bottom plate 12 are positioned at the front ends of the slide holes 71b and 72b of the left and right link levers 71 and 72, as shown in FIG. . Further, the slide pins 64 and 65 are positioned at lower ends of the arc-shaped guide holes 73 and 74 as shown in FIG.

  When the opening / closing lid unit 3 is opened, the left and right link levers 71 and 72 whose front ends are connected to the left and right side plate portions 44 and 45 of the opening / closing lid unit 3 also move forward. The left and right slide pins 64 and 65 attached to the bottom plate 12 of the roll paper storage unit 9 are positioned at the front ends of the slide holes 71b and 72b of the link levers 71 and 72. The bottom plate 12 does not move until the link levers 71, 72 move forward by a predetermined amount and the rear ends of the slide holes 71b, 72b hit the slide pins 64, 65.

  After the slide pins 64 and 65 hit the rear ends of the slide holes 71b and 72b, the slide pins 64 and 65 are pulled forward by the left and right link levers 71 and 72 in conjunction with the opening operation of the opening / closing lid unit 3. . Since the bottom plate 12 to which these slide pins 64 and 65 are attached can be turned around the support shaft 61 at the front end thereof, in conjunction with the opening operation of the opening / closing lid unit 3, the support plate 61 is used as the center. Turn forward.

  As shown in FIG. 6, in the fully open state where the opening / closing lid unit 3 reaches the open position 3B, the bottom plate 12 assumes a forward tilting posture 12B inclined by a predetermined angle. Thus, the bottom plate 12 of the roll paper storage unit 9 is switched from the substantially horizontal posture 12A to the forward tilted posture 12B in conjunction with the opening operation of the opening / closing lid unit 3. When the roll paper 10 is placed on the bottom plate 12, the roll paper 10 rolls on the bottom plate 12 in the forward inclined posture 12B by its own weight, and is fed forward. For example, the remaining roll paper 10A as shown by the imaginary line in FIG. 6 is sent forward as shown by the arrow. As a result, the roll paper 10A can be easily taken out from the upper front side of the openable lid unit 3.

  Further, after the bottom plate 12 starts turning, the open / close lid unit 3 is pulled rearward by the left and right tension coil springs 66 and 67 via the left and right link levers 71 and 72. Therefore, the opening / closing lid unit 3 is prevented from opening vigorously by the tensile force of the tension coil springs 66, 67, and the opening / closing lid unit 3 collides with the printer installation surface and the like, causing damage. Can be avoided.

  Next, when the open / close lid unit 3 is closed, the left and right link levers 71 and 72 are also moved rearward in conjunction with this. Accordingly, the forward tensile force acting on the left and right slide pins 64, 65 of the bottom plate 12 is released, and the bottom plate 12 returns to the original substantially horizontal posture 12A by the spring force of the coil springs 66, 67. As a result, the roll paper 10 placed on the bottom plate 12 is stored in a predetermined position.

1 is an external perspective view of a roll paper printer to which the present invention is applied. FIG. 3 is an external perspective view of the roll paper printer with an opening / closing lid opened. It is a schematic block diagram which shows the internal structure of a roll paper printer. FIG. 3 is a side view of the roll paper printer with a main body case and an open / close lid of the roll paper printer removed. FIG. 5 is a perspective view and a side view of the roll paper printer in a state where one side plate in FIG. 4 is omitted to show the internal structure. It is the perspective view and side view of the state which opened the opening-and-closing lid unit. It is a partial perspective view, a partial plan view, and a partial side view showing a roll paper detection mechanism. FIG. 5 is a partial perspective view, a partial plan view, and a partial side view of the roll paper detection mechanism in a state where the opening / closing lid unit is opened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll paper printer, 2 Printer main body, 3 Opening / closing lid unit, 3A closing position, 3B opening position, 5 Recording paper discharge port, 6 Main body case, 7 Opening / closing lid case, 9 Roll paper storage part 10, 10A Roll paper, 12 Bottom plate, 12A horizontal posture, 12B forward tilted posture, 13 top plate, 14 front plate, 15 platen roller, 16 thermal head, 50 detection protrusion retraction mechanism, 51 detection lever, 53 detection protrusion, 54 detection switch, 54a switching piece, 55 Detection protrusion retracting mechanism, 61 Support shaft, 62, 63 Side plate portion, 64, 65 Slide pin, 66, 67 Extension coil spring, 68, 69 Support pin, 71, 72 Link lever, 71b, 72b Slide hole, 72c Contact plate Part, 73, 74 guide hole, 101 roll paper core hole

Claims (3)

A roll paper storage section;
An opening / closing lid for opening and closing the roll paper storage unit;
A detection lever provided with a detection projection that is pressed against a side surface of the roll paper stored in the roll paper storage unit and inserted into the core hole when the core hole of the roll paper is lowered to a predetermined height position;
In conjunction with the opening operation of the opening / closing lid, it has a detection protrusion retraction mechanism for retreating the detection protrusion of the detection lever protruding from the roll paper storage section from the roll paper storage section. Roll paper printer. In claim 1,
The detection protrusion retracting mechanism moves in a reciprocating manner between a first position removed from the detection protrusion and a second position pushing the detection protrusion into the retracted state in conjunction with the opening / closing operation of the opening / closing lid. A roll paper printer comprising a plate. In claim 2,
The roll paper printer, wherein the detection protrusion retracting mechanism includes a biasing member that biases the movable plate toward the first position.

Images